Condenser



Aug'. 9, 1932. J, A, FRIED 1,870,803

CONDENSER Original Filed Aug. '7, 1926 2 Sheets-Sheet l llwentm Aug. 9, 1932. J. A. FRIED 1,870,803

CONDENSER Original lFiled Aug. 7, 1926 2 Sheets-Sheet 2 lnven Tar Joseph H. Frmd Harney,

Patented Aug. 9, 1932 UNITED STATES PORAIION, OF NEW YORK, N. Y.,

PATENT OFFICE vJOSEPH A. FRIED, 0F FLUSHING, NEW YORK, ASSIGNOR T0 DUBILIER CONDENSER lGORP A. 'CORPORATION DELAWARE coNnENsER Application led August 7, 1926, Serial No. 127,906. Renewed July 6, 1931.

This invention relates to an improvement in electrical condensers, and particularly electrical condensers of the type made by winding thin strips or sheets ofconducting material separated` by insulation into a roll and then imparting to said roll the desired shape.

An object of t-he invention is to provide a condenser which is efficient and durable, but simple in construction and inexpensive to produce. y

The objects and advantages of the invention will appear fully from the following description, taken with the accompanying drawings in which one or'more condensers according to my invention are illustrated.y The disclosure, however,is explanatory only, and I reserve the right to make changes not necessarily shown herein, but embraced within the meanings of the terms of the claims which are hereto appended.

Onfthe drawings:

Figure 1 is aV view showing how one form of condenser according to my invention is made; 'Y

Figure 2 shows such a condenser after receiving the required shape, and being made ready for finishing;

Figure 3 is a perspective viewpf such a condenserfin completed form; Figure 4: is a. longitudinal sectionalview thereof, the body of the condenser being pre# sented diagrammatically;

Figure 5 is a view of 1a wrapping'for the type of condenser shownin Figures 6 to 10 inclusive: n l .n

Figure 6 is a perspective view showing the body of the condenser with such a wrapping thereon; p *1 A Figure is an end view of such a condenser; y y

Figure 8 isa top view thereof;y A

Figure 9 is a 'section on theV-line-9-'9 of Figure; v

Figure 10 is a section on the line 10-10 of. Figure 8, the' body of the .condenser being diagrammatically represented in Figures 9 andlO; and

Figures 11l and 12 are perspective views of other forms of condensers according to this invention.

The same numerals identify the same parts throughout.

In making. a condenser according to my invention, I proceed by taking a sheet or strip of metal foil such as tinfoil 1, laying thereon a strip of insulation, such as paper 2, and then laying upon the strip of paper 2 another sheet or strip of tinfoil 3. Upon the top 'of the tinfoil 3 is another sheet of paper 4. As many sheets of foil and paper or other 'insulation may be included as desired. The superposed sheets of foil and paper are then wound up into a roll, and then this roll is subjected to pressure to give it substantially the form shown in Figures 2 and'3.

In practice, when the sheets of foil 1 and 3, an-d the sheets of insulation 2 and 4 are'arranged in position to be wound up, the forward ends of the sheets of paper are caused to extend beyond the adjacent endsofl the sheets of foil so that the sheets of insulation can be rolled up to' some extent on a rod or spindle in advance of the sheets of-foil 1 and 3, so that the ends of the sheets of foil 1 and 3 will beproperly insulated from each other and the successive turns of these sheets of foil l and 3 will be separated by the insulation. As indicated in Figure 1, the sheets of foil 1, for example, has the edges of the turns thereon projecting at one end of the roll, while the edges of the turns of the sheets 3 project at the other end; the opposite edge of the sheet of foil 1 lying within the roll,'as indicated at 1 while the remaining edge of the sheet of foil 3 also lies within the roll, as indicated at 3. In other words, the'edges of the layers of paper 2 and 4 overlap the inner edges'of the sheetsof foil 1 and 3. This method of winding such a condenser is well-known, and need not be here further described. But when the sheets of foil` and paper, or other insulation, a're wound up, ,I add a sheet of stift' paper 5, generally known as fish paper, placing the end of this sheet of paper 5 under the end of t e outside sheet of paper 4, and then rolling t is sheety or stripV of viishzpaper around the body of the condenser to provide it with a cover or wrapping. The outer end of the sheet of fish paper is secured by suitable means, such as adhesive, or in any other fea-' sible manner.` The roll making up the body of the condenser is then taken off the' winding spindle and compressed or otherwise-treated to give it the form shown in Figure 2. At this stage, the condenser can be put. through any required process to dry the same and impregnate it with wax, or some other insulating mate-rial in liquid form whichlwill penetrate and fill all of the spaces thereof between the layers of foil and insulation. The next step is to attach to the ends a pair of clips 6 which are secured by rivets 7, these rivets at one end going through the projecting edges of the turns of the sheet of foil 1, for example, but clearing the adjacent edges 3 of the turns of the sheet of foil 3. Similarly, at the opposite end, the clip 6 is held by rivets which pass through the projecting edges of the turns of sheet 3 but which clear the inner edges 1 of the turns of the sheet of foil 1. Thus, each clip 6 will be connected to one sheet of foil only, and the condenser can be connected to a circuit simply by oining conductors to these clips. Each clip is shown as having a lug or ear 8 stamped or cut therefrom and bent outward` the lugs or ears 8 having perforations 9. The openings made by these lugs can be filled with solder to unite one of the clips to the sheet 1, and the other clip to the sheet 3 if desired, this solder being indicated at 10; or the solder may be omitted and the ends of the wrapping or covering 5 forming .the casing of the condenser may be filled -with wax to seal the ends of the casing and the body of the condenser therein.

Figure 4 shows in section the clips and the fish pap-er wrapping, but presents the body of the condenser and the wound up sheets of foil and the turns of the sheet of foil3 by dotted lines only, but the rivets 7 are each shown projecting through one of the sheetsof foil only, and thatsheet the one lwhich has the edges of -the turns thereon projecting from the body of the condenser 'within the casing 5.

Y to withstand ordinary usage. If desired, al

A condenser of'this type can be very well made, proves to bevery durable and eicient,

and yet is quite inexpensive.r It can easily w be connected in circuit and`is' strong enough label ,can be 'wrapped around the casing 5 before the clips are'putbn, as indicated at 11 in -Figure 3.

Figure 7 shows atype'of condenser which .comprises a similarly wound body compressed into therequired form, and on the opposite faces ofthe body, I may lay plates of insulation such as bak-elite 12. The body ofthe condenser may omit the tubular 'Wrapping or sleeve 5, or include itif desired, but I prefer to use the wrapping shown in Figure 5 which comprises a strip of relatively thick paper which may be fish paper, as before, with a central portion 17 and two ends 18, the central portion 17 to fit against one face of the body of the condenser, and the end portions 18 to extend around and engage the body, one of these end portions being superposed upon the other.v At the sides this piece of paper is provided with projections 19 which can be folded against the opposite sides of the body of the condenser and between the central portions 17 andv the end portions 18 will be portions 20 which, as shown in Figures 6 and 7, fit against the opposite sides of the body so that the top and bottom of the body of the condenser and the four sides will be enclosed. When the body of a condenser is thus wrapped in the fish paper, it will be completely covered, and in this form it can be dried, pumped free of air and moisture, or otherwise treated as desired. The projecting edges of the portions of the sheet of foil 1 will be in contact with a terminal strip 10, and the projecting edges of the turns of the sheet of foil 3 of opposite polarity at the other end of the condenser will be secured to a similar terminal strip 10 to facilitate making connections to the outside of the condenser, and joining it in circuit. For example, when the body of the condenser is made up and the paper covering is put thereon,` and the plates- 12 are placed upon the upper and lower faces, the terminal strips 10 can be secured to the projecting edges of lthe foils of opposite polarity and b-ent over the edges of the plates 12 at the two ends of the condenser. Then at each end of the condenser I can secure clips of metal, one ofthese clips being shown at 13 and one at 14, and both being held in place by rivets 15. These rivets, as before, will go through the body of the condenser, the rivets at one end passing through the turns of one sheet of foil, but clearing the other, and the rivets at the other end passing through the edges ofthe remaining sheets of foil, but clearing the first sheet. Thus, by securing conductors to the clips 13 and 111, the condenser can be connected in circuit. Each of the clips may. (have an upright portion 16 to facilitate sol- Vdering the clips to it.

Figures 9 and 10, as before, indicate ythe body of the condenser inside the wrapping land between plates 12 in a diagrammatic manner, as in Figure 4.

This type ofcondenser can be used for jecting contact strip 21, and the edges of the turns of the foil of opposite polarity can be united to a contact strip 22 and the ends of the casing filled with wax to seal the body of the condenser therein. Thus the 5 condenser is nished and can be connected in circuit simply by uniting conductors to the projecting terminals 21 and 22. In Figure 11, these terminals can be in the form of strips, while in Figure 12, which shows a 1 similar condenser without clips at the ends, 4the conductors can be in the form of Wires shown at 23 and 24. In both Fi re lland Figure 12, the wax in the end oihe casing u 5, sealing the body of the condenser therein, l5 is indicated at 25.

Of course, instead of `using one sheet of foil 1 and only one sheet of foil 3, I can useA a larger number of sheets of foil if desired.2

Having described my invention, what I 2 believe to be new and desire to secure and protect by Letters Paten-t of the United States 1. A condenser comprising sheets of conductive material separated by insulation wound up and Worked into the required shape,

a Wrapping of insulating material forming a casing for said condenser and clips secured to the ends of said casing, said clips being connected to the opposite terminals of the 3 condenser.

2. A condenser comprising sheets of conductive material separated by insulation wound up and Worked into the required shape, a wrapping of heavy paper forming a casing for said condenser and clips secured to the ends of said casing, said clips being connected to the opposite terminals of the condenser, said clips having lugs cut out of same and projecting therefrom.

4 3. A condenser comprising strips of metallic foil insulated from each other and forming a condenser body having a portion of each foil projecting therefrom, a casing of heavy paper surrounding said body and extending beyond and protecting the ends thereof, and terminals riveted to said casing and connected to the respective foil projections.

Intestimony whereof I affix my signature.

JOSEPH A. FRIED. 

